222321329 has 2 divisors, whose sum is σ = 222321330. Its totient is φ = 222321328.

The previous prime is 222321317. The next prime is 222321331. The reversal of 222321329 is 923123222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115240225 + 107081104 = 10735^2 + 10348^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222321329 is a prime.

Together with 222321331, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 222321298 and 222321307.

It is not a weakly prime, because it can be changed into another prime (222321349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111160664 + 111160665.

It is an arithmetic number, because the mean of its divisors is an integer number (111160665).

Almost surely, 2^222321329 is an apocalyptic number.

It is an amenable number.

222321329 is a deficient number, since it is larger than the sum of its proper divisors (1).

222321329 is an equidigital number, since it uses as much as digits as its factorization.

222321329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 26.

The square root of 222321329 is about 14910.4436218377. The cubic root of 222321329 is about 605.7968953781.

The spelling of 222321329 in words is "two hundred twenty-two million, three hundred twenty-one thousand, three hundred twenty-nine".